headaches ? they are giving that drug to my brother as well as morphine for the switch from suboxone to opiates, the last dose of sub he took was at 7am and that was 4mg he has taken no morphine yet .The doc's want to give him morphine for a day and a half and start in with the methadone (20mg) tomorrow... he is a chronic pain patient and gets bad headaches which do not respond to drugs used to treat migranes like imitrex. I have not heard of lamotrigine used to treat headaches..has anyone? thanking you in advance for your help.